Velocity 3 part question

Question: A rolling ball has an initial velocity of -1.5 m/s.
a. If the ball has a constant acceleration of -0.23 m/s^2, what is its velocity after 2.2s?
b. What was its average velocity during that time interval?
c. How far did it travel in this time interval?

You need not pay much attention to the negative sign given in velocity.it only indicated that the velocity is in the backward direction as from the general Cartesian conventions.
don't plug in the negative sign to get the value of velocity.

Sry, but this still leaves me with the same problem I already figured out question a. I know the formula for question b, but my problem is I dont know what to put for displacement. How would i figure out d1 and d2 in the formula. For question c Im not sure how to solve this question so how would i begin.

Question: A rolling ball has an initial velocity of -1.5 m/s.
a. If the ball has a constant acceleration of -0.23 m/s^2, what is its velocity after 2.2s?
b. What was its average velocity during that time interval?
c. How far did it travel in this time interval?

b. i know the formula for average velocity V= (d2- d1) / (t2 -t1). My problem is I'm not sure what to plug in for displacement. for time i plugged in 2.2s -0s this is where i am stuck.

c. Im not sure of the formula to solve this part.

If you figure out c, you'll have calculated d2-d1.

I'm surprised you'd know the equation you used in a without knowing the equation for determining your position. The equation you used in a is just the derivative of your equation for position: [tex]s_f = s_i + v_i t + 1/2 a t^2[/tex]